CA2084375A1 - Screening method and apparatus - Google Patents

Screening method and apparatus

Info

Publication number
CA2084375A1
CA2084375A1 CA002084375A CA2084375A CA2084375A1 CA 2084375 A1 CA2084375 A1 CA 2084375A1 CA 002084375 A CA002084375 A CA 002084375A CA 2084375 A CA2084375 A CA 2084375A CA 2084375 A1 CA2084375 A1 CA 2084375A1
Authority
CA
Canada
Prior art keywords
chips
screen
disc screen
disc
overthick
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CA002084375A
Other languages
French (fr)
Other versions
CA2084375C (en
Inventor
Antti Tohkala
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Metso Woodhandling Oy
Original Assignee
Sunds Defibrator Woodhandling Oy
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Sunds Defibrator Woodhandling Oy filed Critical Sunds Defibrator Woodhandling Oy
Publication of CA2084375A1 publication Critical patent/CA2084375A1/en
Application granted granted Critical
Publication of CA2084375C publication Critical patent/CA2084375C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21B—FIBROUS RAW MATERIALS OR THEIR MECHANICAL TREATMENT
    • D21B1/00—Fibrous raw materials or their mechanical treatment
    • D21B1/02—Pretreatment of the raw materials by chemical or physical means
    • D21B1/023—Cleaning wood chips or other raw materials
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
    • B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
    • B07B13/00—Grading or sorting solid materials by dry methods, not otherwise provided for; Sorting articles otherwise than by indirectly controlled devices
    • B07B13/14—Details or accessories
    • B07B13/18—Control
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
    • B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
    • B07B9/00—Combinations of apparatus for screening or sifting or for separating solids from solids using gas currents; General arrangement of plant, e.g. flow sheets

Landscapes

  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Wood Science & Technology (AREA)
  • Mechanical Engineering (AREA)
  • Combined Means For Separation Of Solids (AREA)
  • Debarking, Splitting, And Disintegration Of Timber (AREA)

Abstract

The present invention concerns a screening method and apparatus for sorting wood chips into three categories, namely, accept chips, overthick and/or overlong chips requiring further processing and reject fines. The chips are fed onto a disc screen. A major portion of fines and a portion of accepts fall by gravity through clearances between the discs (1) of the disc screen and a portion of the chips travels over the disc screen. Screening of chips on the disc screen is cut short before all accept chips have fallen through the disc screen. Chips travelling over the discharge end of the disc screen are routed onto a roller screen (10), whereby the remaining portion of accepts can fall by gravity through the roller screen while overthick and/or overlong chunky chips are conveyed over the discharge end of the roller screen.
CA002084375A 1991-12-10 1992-12-02 Screening method and apparatus Expired - Fee Related CA2084375C (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FI915803A FI90019C (en) 1991-12-10 1991-12-10 SAOLLNINGSFOERFARANDE OCH -ANORDNING
FI915,803 1991-12-10

Publications (2)

Publication Number Publication Date
CA2084375A1 true CA2084375A1 (en) 1993-06-11
CA2084375C CA2084375C (en) 2002-07-23

Family

ID=8533642

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002084375A Expired - Fee Related CA2084375C (en) 1991-12-10 1992-12-02 Screening method and apparatus

Country Status (3)

Country Link
US (1) US5232097A (en)
CA (1) CA2084375C (en)
FI (1) FI90019C (en)

Families Citing this family (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5799801A (en) * 1994-06-22 1998-09-01 Bulk Handling System, Inc. Method and apparatus for separating paper from cardboard
US5901856A (en) * 1996-03-29 1999-05-11 Brantley, Jr.; Stanley A. Paper and cardboard separator with inverting rotor
DE59608838D1 (en) * 1996-04-11 2002-04-11 Dieffenbacher Schenck Panel Process for the continuous production of a nonwoven for the production of wood-based panels or similar boards
US5960964A (en) * 1996-05-24 1999-10-05 Bulk Handling, Inc. Method and apparatus for sorting recycled material
US20020175113A1 (en) * 1998-05-22 2002-11-28 Hannu Tahkanen Method and apparatus for sorting of chips
FI104471B (en) * 1998-07-09 2000-02-15 Sunds Defibrator Woodhandling Process and apparatus in the screening of chips
US6325215B1 (en) * 1999-04-07 2001-12-04 The United States Of America As Represented By The Secretary Of Agriculture Method and apparatus for separating elastomeric particulates and fibers from a pulverized mixture
ES2246211T3 (en) 2000-04-18 2006-02-16 Machinefabriek Bollegraaf Appingedam B.V. CONVEYOR FOR THE TRANSPORTATION OF BULK MATERIALS.
DE102004008642A1 (en) * 2004-02-19 2005-09-08 Hauni Primary Gmbh Method and device for removing foreign substances from tobacco to be processed
CA2476194C (en) 2004-07-30 2010-06-22 Suncor Energy Inc. Sizing roller screen ore processing apparatus
US8393561B2 (en) 2005-11-09 2013-03-12 Suncor Energy Inc. Method and apparatus for creating a slurry
DE102006002880A1 (en) * 2006-01-20 2007-07-26 Dieffenbacher Gmbh + Co. Kg Method and forming station for forming a spreading material mat in the course of the production of wood-based panels
US8307987B2 (en) * 2006-11-03 2012-11-13 Emerging Acquisitions, Llc Electrostatic material separator
US8618432B2 (en) 2007-12-18 2013-12-31 Emerging Acquisitions, Llc Separation system for recyclable material
CA2640514A1 (en) 2008-09-18 2010-03-18 Kyle Alan Bruggencate Method and apparatus for processing an ore feed
US8336714B2 (en) * 2009-05-14 2012-12-25 Emerging Acquistions, LLC Heating system for material processing screen
CA2812114C (en) * 2009-07-24 2013-12-24 Suncor Energy Inc. Screening disk, roller, and roller screen for screening an ore feed
US10111385B2 (en) 2016-06-24 2018-10-30 Jackrabbit Nut harvester with separating disks
AU2020218530A1 (en) 2019-02-08 2021-08-12 Jackrabbit, Inc. A nut harvester with a removable assembly and a method of replacing a removable assembly of a nut harvester
CN115740159B (en) * 2022-12-20 2023-08-15 南皮县绿源环保设备有限公司 Stamping device is used in automobile punching part processing

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1899292A (en) * 1929-11-11 1933-02-28 George W Rienks Screening device
SE406280B (en) * 1977-10-03 1979-02-05 Luossavaara Kiirunavaara Ab TERM
US4430210A (en) * 1979-07-13 1984-02-07 Rauma-Repola Oy Screen
US4376042A (en) * 1981-05-11 1983-03-08 Weyerhaeuser Company Chip sizing process
US4789068A (en) * 1986-05-14 1988-12-06 Gilmore Larry J Wood chip classifying system
US5012933A (en) * 1988-02-12 1991-05-07 Acrowood Corporation Machine and method for sorting out over-thick wood chips
US5058751A (en) * 1988-02-12 1991-10-22 Acrowood Corporation Machine for sorting out over-thick wood chips
US5000390A (en) * 1989-05-30 1991-03-19 Weyerhaeuser Company Apparatus and method for sizing wood chips
US5078274A (en) * 1990-02-13 1992-01-07 James River Corporation Of Virginia Method and apparatus for wood chip sizing
US5137621A (en) * 1990-03-02 1992-08-11 Weyerhaeuser Company Integrated screening system for sizing wood chips

Also Published As

Publication number Publication date
FI915803A0 (en) 1991-12-10
FI90019B (en) 1993-09-15
FI90019C (en) 1993-12-27
FI915803A (en) 1993-06-11
CA2084375C (en) 2002-07-23
US5232097A (en) 1993-08-03

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Legal Events

Date Code Title Description
EEER Examination request
MKLA Lapsed
MKLA Lapsed

Effective date: 20101202